/* ========================================
   数安管家 - 通用样式与变量
   ======================================== */

:root {
  /* 主色调 */
  --primary: #1a56db;
  --primary-dark: #0d3a7a;
  --primary-light: #3b82f6;
  
  /* 辅助色 */
  --accent: #10b981;
  --accent-light: #34d399;
  
  /* 中性色 */
  --gray-900: #111827;
  --gray-800: #1f2937;
  --gray-700: #374151;
  --gray-600: #4b5563;
  --gray-500: #6b7280;
  --gray-400: #9ca3af;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --gray-50: #f9fafb;
  --white: #ffffff;
  
  /* 渐变色 */
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0d3a7a 100%);
  
  /* 字体 */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* 间距 */
  --section-padding: 80px 0;
  --container-max: 1200px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

/* ========================================
   基础重置
   ======================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-700);
  background-color: var(--white);
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ========================================
   容器
   ======================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   导航栏
   ======================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 16px 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  color: var(--primary);
}

.logo-icon {
  width: 36px;
  height: 42px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-weight: 500;
  font-size: 15px;
  color: var(--gray-600);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--gray-700);
  transition: all var(--transition-base);
}

/* ========================================
   英雄区域
   ======================================== */

.hero {
  position: relative;
  min-height: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 100px 0 60px;
  overflow: hidden;
  text-align: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: -2;
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(26, 86, 219, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.2) 0%, transparent 40%);
  z-index: -1;
}

.hero-content {
  flex: 1;
  max-width: 800px;
  color: var(--white);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
  text-align: center;
}

.hero-title {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-visual {
  display: none;
}

/* ========================================
   按钮
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--white);
  color: var(--primary);
}

.btn-primary:hover {
  background: var(--gray-100);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}

.btn-lg {
  padding: 18px 36px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

/* ========================================
   章节通用样式
   ======================================== */

.section {
  padding: var(--section-padding);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  padding: 6px 14px;
  background: var(--primary);
  color: var(--white);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 18px;
  color: var(--gray-500);
}

/* ========================================
   法规通知区域
   ======================================== */

.regulations {
  background: var(--gray-50);
  padding: 40px 0;
  border-bottom: 1px solid var(--gray-200);
}

.regulations-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.regulation-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.regulation-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.regulation-card h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-800);
}

.regulation-tag {
  padding: 4px 8px;
  background: var(--accent);
  color: var(--white);
  font-size: 11px;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

/* ========================================
   服务架构
   ======================================== */

.services {
  background: var(--white);
}

.architecture {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.arch-core {
  text-align: center;
  padding: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  color: var(--white);
}

.core-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.core-icon svg {
  width: 48px;
  height: 48px;
}

.arch-core h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.arch-core p {
  font-size: 16px;
  opacity: 0.9;
}

.arch-phases {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.phase-card {
  position: relative;
  padding: 32px 24px;
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.phase-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.phase-number {
  position: absolute;
  top: -20px;
  left: 24px;
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.phase-content h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.phase-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}

.phase-content p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ========================================
   核心服务
   ======================================== */

.core-services {
  background: var(--gray-50);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.service-card {
  padding: 40px;
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: var(--gray-100);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.service-icon svg {
  width: 36px;
  height: 36px;
  color: var(--primary);
}

.service-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--gray-600);
}

.service-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

/* ========================================
   行业解决方案
   ======================================== */

.solutions {
  background: var(--white);
}

.solutions-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-600);
  background: var(--gray-100);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.tab-btn:hover {
  color: var(--primary);
  background: var(--gray-200);
}

.tab-btn.active {
  color: var(--white);
  background: var(--primary);
}

.solutions-content {
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.solution-panel {
  display: none;
  padding: 48px;
  animation: fadeIn 0.4s ease;
}

.solution-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.solution-info {
  margin-bottom: 32px;
}

.solution-icon-lg {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.solution-icon-lg svg {
  width: 48px;
  height: 48px;
  color: var(--white);
}

.solution-info h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.solution-pain {
  font-size: 16px;
  color: var(--gray-600);
  padding: 16px;
  background: var(--white);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
}

.solution-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-item {
  padding: 24px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.feature-item h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.feature-item p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ========================================
   服务套餐
   ======================================== */

.packages {
  background: var(--gray-50);
}

.packages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: start;
}

.package-card {
  position: relative;
  padding: 40px 32px;
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--transition-base);
}

.package-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.package-card.featured {
  background: var(--gradient-primary);
  color: var(--white);
  transform: scale(1.05);
  z-index: 1;
}

.package-card.featured:hover {
  transform: scale(1.05) translateY(-8px);
}

.package-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 20px;
  background: var(--accent);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  border-radius: var(--radius-full);
}

.package-header h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.package-desc {
  font-size: 14px;
  opacity: 0.8;
  margin-bottom: 24px;
}

.package-price {
  margin-bottom: 24px;
}

.package-card:not(.featured) .package-price {
  color: var(--primary);
}

.price {
  font-size: 42px;
  font-weight: 800;
}

.unit {
  font-size: 14px;
  opacity: 0.8;
}

.package-features {
  text-align: left;
  margin-bottom: 32px;
}

.package-features li {
  padding: 10px 0;
  font-size: 14px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.package-card.featured .package-features li {
  border-bottom-color: rgba(255, 255, 255, 0.2);
}

.package-card.featured .package-features li::before {
  background: var(--white);
}

.package-card:not(.featured) .btn-outline {
  border-color: var(--primary);
  color: var(--primary);
}

.package-card:not(.featured) .btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}

/* ========================================
   服务优势
   ======================================== */

.advantages {
  background: var(--white);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.advantage-card {
  padding: 40px;
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.advantage-card:hover {
  background: var(--white);
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.advantage-icon svg {
  width: 32px;
  height: 32px;
  color: var(--white);
}

.advantage-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.advantage-card p {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ========================================
   服务承诺
   ======================================== */

.commitments {
  background: var(--gray-50);
}

.commitments-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.commitment-card {
  padding: 32px 24px;
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.commitment-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.commitment-num {
  font-size: 48px;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.15;
  margin-bottom: 16px;
}

.commitment-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.commitment-card p {
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.7;
}

.commitment-card p strong {
  color: var(--gray-800);
}

/* ========================================
   结语区域
   ======================================== */

.conclusion {
  background: var(--gradient-hero);
  color: var(--white);
}

.conclusion-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.conclusion-content h2 {
  font-size: 24px;
  font-weight: 500;
  opacity: 0.8;
  margin-bottom: 24px;
}

.conclusion-main {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  margin-bottom: 32px;
}

.conclusion-sub {
  font-size: 18px;
  line-height: 2;
  opacity: 0.8;
  margin-bottom: 48px;
}

.conclusion-cta {
  display: flex;
  justify-content: center;
}

/* ========================================
   联系区域
   ======================================== */

.contact-section {
  padding: 80px 0;
  background: var(--white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-info h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
}

.contact-info > p {
  font-size: 16px;
  color: var(--gray-600);
  margin-bottom: 40px;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-icon {
  width: 56px;
  height: 56px;
  background: var(--gray-100);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

.contact-item h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-500);
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-900);
}

/* 悬浮客服按钮 */
body > a.floating-service,
.floating-service {
  position: fixed !important;
  right: 20px !important;
  bottom: 120px !important;
  display: flex !important;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 22px;
  background: linear-gradient(135deg, #07c160 0%, #06ad56 100%) !important;
  color: #ffffff !important;
  border-radius: 50px !important;
  font-weight: 600 !important;
  font-size: 15px !important;
  box-shadow: 0 4px 16px rgba(7, 193, 96, 0.4) !important;
  z-index: 9999 !important;
  transition: all 0.3s ease !important;
  text-decoration: none !important;
}

.floating-service:hover {
  transform: translateY(-4px) !important;
  box-shadow: 0 8px 24px rgba(7, 193, 96, 0.5) !important;
}

.floating-service svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .floating-service {
    right: 12px !important;
    bottom: 80px !important;
    padding: 12px 18px !important;
    font-size: 14px !important;
  }
  
  .floating-service svg {
    width: 18px;
    height: 18px;
  }
}

.contact-form-wrapper {
  background: var(--gray-50);
  padding: 48px;
  border-radius: var(--radius-xl);
}

.contact-form h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-400);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

/* ========================================
   页脚
   ======================================== */

.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 60px 0 24px;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  color: var(--white);
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  font-size: 14px;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--white);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--gray-800);
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
}

.footer-bottom .friendly-links {
  margin-top: 16px;
  font-size: 13px;
}

.footer-bottom .friendly-links a {
  color: var(--gray-400);
  transition: color var(--transition-fast);
}

.footer-bottom .friendly-links a:hover {
  color: var(--white);
}

.footer-bottom .link-separator {
  margin: 0 8px;
  color: var(--gray-600);
}

/* ========================================
   响应式设计
   ======================================== */

@media (max-width: 1024px) {
  .arch-phases {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .packages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .packages-grid .package-card.featured {
    transform: none;
  }
  
  .packages-grid .package-card.featured:hover {
    transform: translateY(-8px);
  }
  
  .commitments-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow-lg);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  
  .hero {
    flex-direction: column;
    text-align: center;
    padding: 100px 0 60px;
  }
  
  .hero-content {
    max-width: 100%;
    align-items: center;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-visual {
    display: none;
  }
  
  .regulations-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .services-grid,
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  
  .solution-features {
    grid-template-columns: 1fr;
  }
  
  .packages-grid {
    grid-template-columns: 1fr;
  }
  
  .commitments-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  :root {
    --section-padding: 60px 0;
  }
  
  .container {
    padding: 0 16px;
  }
  
  .hero-title {
    font-size: 28px;
  }
  
  .section-title {
    font-size: 24px;
  }
  
  .regulations-grid,
  .arch-phases,
  .commitments-grid {
    grid-template-columns: 1fr;
  }
  
  .phase-card {
    padding: 32px 20px;
  }
  
  .solution-panel {
    padding: 32px 24px;
  }
  
  .contact-form-wrapper {
    padding: 32px 24px;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}